申请人:——
公开号:US20040014597A1
公开(公告)日:2004-01-22
Solid catalyst components comprising Ti,Mg, halogen and an internal electron-donor compound selected from the 1,3-diethers of formula (I) in which R is a C
1
-C
10
alkyl group, R
1
is a linear or branched primary alkyl radical having at least three carbon atoms, optionally containing a heteroatom, and R
2
is a secondary alkyl or cycloalkyl radicals different from i-propyl, optionally containing a heteroatom. The catalysts obtained by using as internal electron-donor compound the said 1,3-diethers display in the (co)polymerization of olefins an excellent balance of activity and stereospecificity that cannot be reached with the ethers known in the art.
1
固体催化剂组分,包括钛、镁、卤素和选自式(I)的 1,3-二乙基化合物的内电子给体化合物,式(I)中 R 是 C
1
-C
10
烷基,R
1
是至少含有三个碳原子的直链或支链伯烷基,可选择含有一个杂原子,以及 R
2
是不同于 i-丙基的仲烷基或环烷基,可选择含有一个杂原子。使用上述 1,3-二醚作为内电子供体化合物得到的催化剂,在烯烃的(共)聚合反应中显示出极佳的活性和立体特异性的平衡,这是本行业已知的醚类化合物所无法达到的。
1